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What is annealing? Why is it necessary?

One of the most distinctive physical properties of glass is how it reacts to temperature variation.  When it heats it expands; and as it cools it contracts.  These processes create stresses within the glass especially between the read more

How do I restrain glass flow?

Restraining glass flow requires the use of kiln furniture such as side walls and dams.  In Tipsheet 3 Working Deep and TipSheet 5 Bullseye Box Casting we discuss the fundamentals of using these tools in the context of specific kilnforming read more

How do I program a Paragon kiln to go as fast as possible?

Paragon kilns are great kilns for the home studio or workshop.  We recommend them for their high quality and ease of use. In order to get a Paragon kiln to heat or cool as quickly as possible simply enter the rate 9999°F. Related read more

How do I prevent glass from sticking to kiln shelves?

Hot glass will adhere to kiln shelves if not prevented by a separator. For most basic kilnforming projects Bullseye Shelf Primer is an ideal separator. It's affordable highly effective and easy to use. See Using Bullseye Shelf Primer read more

How do I make a desktop?

Making a glass desktop can be a complex project requiring a fair amount of experience and specialized equipment. If you're serious about making a desktop we recommend that you take basic kilnforming classes to learn about the tools and read more

How do I know whether to use Standard 3 mm glass or Thin (2 mm) glass?

Consider the 6-millimeter rule When heated to full fusing temperatures most Bullseye sheets will naturally assume a thickness of about 6 millimeters unless constrained by dams or molds. For projects like plates and tiles you may want read more

Do you have projects that teach about kiln forming?

Yes we have several projects with step-by-step instructions to teach you a variety of different kiln forming methods. If you haven't already consider subscribing to Bullseye Videos. These video lessons are the next best thing read more

Can I make my own stringers?

Yes you can hand-pull your own stringers using a Vitrigraph kiln. If you have the opportunity to use a Vitrigraph kiln we highly recommend you take it. Not only is it fun but you will be able to make unusually shaped stringers that can read more

What is kilnforming?

Kilnforming is the process of shaping glass in a kiln with heat and gravity. There are many methods and techniques that are related to kilnforming including glass fusing glass slumping kilncasting and printmaking. There is a type of read more

What's the difference between kilncasting and lost wax kilncasting?

Lost wax kilncasting is just one of many kilncasting methods. To learn more about this method see TipSheet 8 Basic Lost Wax Kilncasting  or our Video lesson Lost Wax Kilncasting. FAQs Return to Index of FAQs  read more

Murakami SP-9500 Diazo Sensitizer Mixing Instructions

Overview Murakami's premier dual cure graphic emulsion. Outstanding resolution of fine details. An easy to use emulsion with wide latitude and exceptional durability. For instructions' download our Diazo Mixing Instructions…

Quick Tip: On the Edge with Transparents

Transparents transform with on-edge strip construction Cut 3mm sheet glass into 1cm wide strips' turn those on edge' and—presto!—color saturation increases. In the pairings below' notice how the 1cm thick on-edge samples…

Quick Tip: Fritfetti

Say yes to sprinkles! Steps (4 firings) Make frit balls with Medium Frit. See Quick Tip' Frit Balls. Cut 7” (approx. 18cm) circles. You’ll need 3 circles of Clear and one of each opalescent style to make the…

Pre-Firing Your New Kiln

Overview Before using a new kiln for glass projects' you will need to pre-fire it. This burns out binders' moisture' and other residue left over from the manufacturing process. Read and download the PDF file' Pre-Firing…

Quick Tip: Little Wisp Bowls

Create your own streaky color palette. Layer Clear and White Streaky sheet glass over transparent tint glass styles. Slump in the Cone Bowl mold to upturn the edges and achieve luscious color at the rim. We’re making bowls…

Glossary

Anneal' To cool previously heated glass through a specific temperature range in order to relieve excessive stress once the glass reaches room temperature. Annealer' More accurately called an annealing kiln or annealing oven. A…

Quick Tip: Opaline Overlays

Style codes for glasses above' White (000113-0030)' Driftwood Gray (000132-0030)' Elephant Gray (000206-0030)' Deco Gray (000136-0030)' Slate Gray (000236-0030)' Black (000100-0030)   Opaline sheet glass. Amazing…

Using Fusible Decal Paper to Transfer Laser Printed Images

Overview With this paper you can make a decal out of any image that you can print on a laser printer' including letters' numbers' line art' graphics' or even photographs. A black and white photograph that has good contrast as…

Quick Tip: Smooth It Out

Create a smooth' uniform surface on the shelf side of your fired work—not a brush stroke in sight! First' prepare a kilnshelf with Bullseye Shelf Primer. Follow the instructions in our free video Preparing Kiln…

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New to using Bullseye Glass?

 "Your choice of glass is probably the most important decision you will make as a kilnformer." -Artist Steve Immerman on why he exclusively uses Bullseye. Bullseye glass is developed by artists, for artists. We've got your…

Is it safe to fire Bullseye Glass in a kiln?

Yes. At cold temperatures and typical firing temperatures, the colorants are encapsulated in the glass and the glass does not emit odors or toxics into the air. However, ventilation is recommended to dissipate odors from shelf…

What is The Rule of Halves?

This rule is important to know for successful glass cutting. A score is more likely to run properly when there are equal amounts of glass on either side of it. This is particularly important for cutting strips of…

Why should I choose Bullseye glass over other glasses?

When you buy Bullseye glass, you're investing in top-quality materials and technical resources: Our standards for testing and quality are the highest in the industry and our products are unsurpassed for consistency and…

How do I know which Bullseye clear glass to use?

Tekta is Bullseye's signature style of clear glass. Bullseye manufactures two styles of its Tekta glass: Tekta Clear and Tekta Crystal Clear. Tekta Crystal Clear is recommended for crystal clarity, especially in thicker works.…

Can I get samples of your glass?

Yes. Our popular sample sets for sheet glass, billets, and rods are great resources for any studio. Note that these samples are for color reference only. They are not intended for reheating and may not be fusible.

Is there bubble-free glass?

Bubbles are found in all handcrafted glasses. They contribute to the art and beauty of finished glasswork. You can learn to minimize bubble formation or to create bubble patterns and effects by reading TechNotes 5: Volume &…

What are Special Production glasses?

Occasionally we produce limited runs of top grade glass styles that are not included in our regular product line. We refer to these as “Special Production” sheets. Special Production sheets may be one-of-a-kind or available in…

What are Curious glasses?

The grading system for our handmade glass demands that each sheet match a target color and have a uniform appearance to receive first-quality grade. Glass that is not quite the target color or that has some other…

Is all Bullseye glass recommended for fusing?

No, but all of our glass goes through a rigorous quality assessment and assigned a grade. Our top-quality sheet glass comes in two grades: Fusible and Standard (non-fusible). Fusible glass is coded as “F” and Standard or…

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